Generation of spatially broadband twin beams for quantum imaging
Generation of spatially broadband twin beams for quantum imaging
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DOI：
10.1103/physrevlett.100.143601
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发表时间：
2008-04-11
影响因子：
8.6
通讯作者：
Lett, P. D.
中科院分区：
文献类型：
--
作者：
Boyer, V.;Marino, A. M.;Lett, P. D.
我们在相位不敏感行波放大器配置下的热原子蒸汽中利用四波混频产生空间多模孪生光束。在3.5 MHz下测量的远场相干区域显示比该过程的角带宽小得多，并且可以产生具有独立量子关联子区域的明亮孪生像且几乎没有失真。可用的横向自由度形成一个高维希尔伯特空间，我们利用它来产生具有有限轨道角动量的量子关联孪生光束。
We generate spatially multimode twin beams using 4-wave mixing in a hot atomic vapor in a phase-insensitive traveling-wave amplifier configuration. The far-field coherence area measured at 3.5 MHz is shown to be much smaller than the angular bandwidth of the process and bright twin images with independently quantum-correlated subareas can be generated with little distortion. The available transverse degrees of freedom form a high-dimensional Hilbert space that we use to produce quantum-correlated twin beams with finite orbital angular momentum.